public void Add(Component component)
{
CollisionRegion region = GetRegion(component);
if (region == null)
{
return;
}
region.AddComponent(component);
}
public bool Remove(Component component)
{
CollisionRegion region = GetRegion(component);
if (region == null)
{
return(false);
}
return(region.RemoveComponent(component));
}
private CollisionRegion GetRegion(Component gameObject)
{
Vector2 coordinates = GetCoordinates(gameObject.Position);
if (!IsValidRegion((int)coordinates.X, (int)coordinates.Y))
{
return(null);
}
CollisionRegion bucket = collisionRegions[(int)coordinates.X][(int)coordinates.Y];
return(bucket);
}
private CollisionRegion GetOffsetRegion(Component gameObject, int xOffset, int yOffset)
{
Vector2 coordinates = GetCoordinates(gameObject.Position);
/* If the coordinates are out of bounds, we return null. */
if (!IsValidRegion((int)coordinates.X + xOffset, (int)coordinates.Y + yOffset))
{
return(null);
}
CollisionRegion bucket = collisionRegions[(int)coordinates.X + xOffset][(int)coordinates.Y + yOffset];
return(bucket);
}
public HashSet <Component> GetObjectsCollided(Component component, Type type)
{
HashSet <Component> ret = new HashSet <Component>();
double radius = component.HitBoxRadius;
/* Directions */
int[,] dirs = new int[, ] {
{ 1, 1 }, { 0, 1 }, { -1, 1 },
{ 1, 0 }, { 0, 0 }, { -1, 0 },
{ 1, -1 }, { 0, -1 }, { -1, -1 }
};
// Check all neighbors
for (int i = 0; i < 9; ++i)
{
for (int j = 1; j <= 1; ++j)
{
int xOffset = dirs[i, 0];
int yOffset = dirs[i, 1];
CollisionRegion collision = GetOffsetRegion(component, xOffset, yOffset);
//null indicates that the coordinates were invalid
if (collision != null)
{
//For all game objects in the bucket, if within the collision region add to return set
foreach (Component componentObj in collision.GetComponents())
{
if (!componentObj.GetType().IsSubclassOf(type) && !componentObj.GetType().Equals(type))
{
continue;
}
if (componentObj.BoundsContains(componentObj) ||
componentObj.BoundsContains(componentObj))
{
ret.Add(componentObj);
}
}
}
}
}
return(ret);
}
